11.15 Bar Chart Labels

20210413

## Warning: Removed 1 row containing missing values or values outside the scale
## range (`geom_bar()`).

## Warning: Removed 1 row containing missing values or values outside the scale
## range (`geom_label()`).

ds %>%
  ggplot(aes(x=wind_dir_3pm)) +
  geom_bar() +
  geom_label(stat="count", aes(label=comma(..count..)), vjust=-0.2, size=3) +
  scale_y_continuous(labels=comma, limits=c(0, 23000)) +  
  labs(x=vnames["wind_dir_3pm"], y="Count")

A ggplot2::geom_label() can be used to add highlighted labels to a chart. Here for example they are added to a bar chart. Also see Section 11.20 to add just text and and ?? to add labels to a bar chart with dodged bars.

Notice the use of scales::comma() for the labels as should be standard practice.

To tune the plot we’ve increased the y-axis to fit the label using the limits= option of the ggplot2::scale_continuous() function.

Exercise: further tuning to improve the presentation.

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